--- nono/vm/vm_luna.h	2026/04/29 17:04:32	1.1.1.1
+++ nono/vm/vm_luna.h	2026/04/29 17:04:36	1.1.1.2
@@ -1,6 +1,7 @@
 //
 // nono
-// Copyright (C) 2020 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
 //
 
 #pragma once
@@ -9,16 +10,17 @@
 
 class VM_LUNA : public VM
 {
-	typedef VM inherited;
+	using inherited = VM;
  public:
 	VM_LUNA();
-	virtual ~VM_LUNA();
+	~VM_LUNA() override;
 
 	// 電源ボタンを押す。
-	virtual void PowerButton();
+	void PowerButton() override;
 
  private:
 	std::unique_ptr<CRTC2Device> crtc2;
+	std::unique_ptr<IODevice> prom;
 	std::unique_ptr<SysClkDevice> sysclk;
 	std::unique_ptr<NullDevice> nulldev;
 
@@ -27,17 +29,18 @@ class VM_LUNA : public VM
 
 class VM_LUNA88K : public VM
 {
-	typedef VM inherited;
+	using inherited = VM;
  public:
 	VM_LUNA88K();
-	virtual ~VM_LUNA88K();
+	~VM_LUNA88K() override;
 
 	// 電源ボタンを押す。
-	virtual void PowerButton();
+	void PowerButton() override;
 
  private:
 	std::unique_ptr<CRTC2Device> crtc2;
 	std::unique_ptr<FuseROMDevice> fuserom;
+	std::unique_ptr<IODevice> prom;
 	std::unique_ptr<SysClkDevice> sysclk;
 	std::unique_ptr<NullDevice> nulldev;